QR 3733 then QS 1059 at Barcelona
Mahón → Barcelona → Prague
Timetable, Barcelona time
19:25QR 3733 from Mahón at the gate
14:55QS 1059 to Prague leaves the gatealso EW 3043
19 h 30 apart on the timetable, overnight
QS 1059 leaves 19 h 30 after QR 3733 arrives on the timetable: more than half a day, so not a connection we count.